Ooh I'll look forward to seeing this game! Nice work so far, you've done well to make all the sponsorship recognisable, but I wonder if some of it compromises the form a little?
I think because of all the extra colours the adverts force into your pallettes, and the fact that these shouldnt need much animation, you'd be forgiven for not being too conservative with colours.
I had a go at doing a bit of an edit for the Ferrari:
Now I've not done much, but the first thing I've done is slightly changed your pallette and added two extra colours ( I actually found two stray colours not in your pallette so technically I didnt add any). If this was mine, i'd probably add another couple just so I can aa some parts better.
The most notable pixel changes I suppose are the tyres, hopefully they look a lot smoother and more rubbery. Also in some places where you'd used black on the body, I've gone for the next nearest colour, and I've added a few more highlighted areas to give a greater feeling of height on some parts.
I couldnt find any reference pics for this year, so I havnt done much to the form, but one thing I did do was try and show the shape of the central fin (the vertical bit) a bit better, by making the advertising on each side darker, and leaving a bright stripe down the middle.
This is what I meant about the sponsorship compromising the form, at this sort of scale, any text or logos are only symbolic anyway so personally I'd put a bit more emphasis on showing the shapes of things. You seem to have done this well on the plain colour areas.
Just a personal approach but hopefully some will help, again good work so far.